Stirrup pump



Dec. 14,4943. 3 D. KELLEHER x-:TAL 2,336,990

STIRRUP PUMP FiledJune 27, 1942 2 Sheets-Sheet l /5124 @u v lzZa/n/ K Dc. l14, 1943. D, KELLEHER ET AL.

lSTIRRUP PUMP Filed June 27, 1942 2 sheets-sheet 2 Hele/VAN I 77Pocf/f Patented Dec. 14, 1943 antan 2,335,990 errance reime nemer Kelleher, strengsvine, and nennen r.

Troche, Cleveland Heights, Ohio, assignors to The American Coach e Body Company, Cleveland, Ohio, a corporation of @hic Application .inne 27, 1942, Serial No. 443,788

8 Gianna.

This invention relates to a hand pump of the stirrup type, wherein a pump cylinder or barrel is mounted on a bracket adapted to be retained. in position on the ground by the operators foot to hold the barrel in a vertical position with the lower end thereof within a liquid container. This facilitates the use of the pump with various containers and enables a plunger in the barrel to be readily reciprocated up and down by the operator to draw iluid from a container and deliver a stream or spray through a suitable discharge conduit. Pumps of this general type have been found very useful in lighting chemical fires and incendiary bombs, as Well as for various types of horticultural spraying.

The present invention is particularly concerned with a formation of the bracket and its attachment to the barrel, and a provision whereby a welded construction may be used to secure a previously enameled barrel to the bracket.

A further object of this invention is the provision of a pun-'1p of the stirrup type which may be constructed of comparatively light weight materials with a minimum amount of machine 1inished surfaces and yet which will be extremely rigid and capable of eincient operation.

Another feature of this invention is concerned with the internal construction of the pump mech anism which is particularly adapted for use in connection with internally enameled pump barrels.

Other advantages of the present invention will become more apparent from the following detailed description, referring to a pr ferred embodiment of the invention illustrated in the drawings. The essential and novel features of the invention will be summarized in the claims.

In the drawings, Fig. l is a vertical section of the pump and bracket, the plane of the section being indicated by the line l--l in Fig. 2; Fig. 2 is a front elevation of the pump; Fig. 3 is a horizontal section on an enlarged scale, the plane indicated by the line S-3 on Fig. 1,' Fig. Ll is a vertical section through the pump barrel, particularly illustrating the lower portion of the pump barrel and plunger; and Fig. 5 is a perspective of dierent members of the bracket, detached from each other.

The pump with which this invention is particularly concerned comprises in general, a pump barrel lo mounted o-n a standard 2@ adapted to have its lower end positioned within a bucket or container generally indicated in Fig. 1 at ll. The pump barrel is arranged to receive liquid at its lower end past a check valve it. Within the barrel is a vertically reciprocable plunger to the upper end of which is secured a handle t@ by means of which the plunger may be reciprocated. A suitable conduit, such as for instance' a hose tl is connected with the barrel and with a suitable spray nozzle indicated in 2 at The pump bracket is shown in Figs. 1 and 5 as comprising a base 2l and an upright 22 rising therefrom and provided with av bent over substantially horizontal top portion 23. The base is preferably a sheet metal platform and may, if desired, be stiifened by a suitable reinforcing rib 2d. The upright portion 22 of the bracket is channel shaped in cross section as shown in 1 and has its lower end abutting and secured to the base 2|. As shown inv Fig'. 5, the lower end of the upright is provided with downwardly exu tending tongues 25 arranged to extend through an opening 25 in the base. After insertion of the lower end of the tongues in the opening, they may be bent transversely as indicated in Figs. l and 2' to lock the upright to the base.

The pump barrel is secured to the outer end of the horizontally turned over top portion of the upright. As shown in Fig. 5, the web of this horizontal portion of the upright, adjacent its outer end, is slotted as at 23 to provide a pair of tines 2'! to receive and embrace the barrel. The barrel is held in position therein between the tines 2l and against the base oi the slot by a retainer 2S. This retainer comprises a U-shapcd member having upper and lower legs 3l and 32, each of which is provided with a slotted opening 33, thus in effect each leg of the U-shaped inemm ber comprises a pair of tines which embrace the pump barrel as indicated in Figs. l and 3. The retainer is secured to the bracket as by welds, thus preventing transverse movement of the barrel. The exhaust tube 3l is secured to the barirel, as by welding, and passes through an opening 36 in the retainer, thus preventing vertical movement of the barrel.

As shown in Figs. 3 and 5,V the lower ieg the retainer or attaching member 29 is provided with an outwardly extending portion Si having a slot 39, to receive a strap which may be used to retain the hose member di in position on the pump.

The handle of the bracket or plunger Si! is preferably made large to accommodate both hands ci the operator. Accordingly, the nozzle may be manipulated by another person, the operator standing with both feet on the platform El thus allowing a vigorous operation on the pump. As

shown in Fig. 1, this handle may be secured to is mounted on the plunger in any well-known manner. .e

The pump mechanism itself is best shown in Figs. 1 and 4. As heretofore mentioned, the intake at the lower end of the pump barrel is controlled by a check valve I4. This check valve may comprise a ball, seated over an opening 43 in a fitting 44 carrying a base i8 and into which the pump barrel l is threaded. The upper movement of the ball is limited by a bent wire 45, having a lower ring portion 45 through which the ballmay pass and which may be welded or otherwise secured to the lower end of the tube. The wire also has an upper ring or ball retaining portion 41, spaced above the ball and of a diameter somewhat smaller than that of the ball.v

Mounted in the base 48 of the pump, below the opening 43, is a strainer plate 4S. As shown, this plate has a series of comparatively small openings and extends entirely acrossv the base, being secured thereto as in any well-known manner. The strainer plate prevents improper matter passing into the pump barrel on the suction stroke of the pump.

As illustrated in the drawingsthe pump plunger comprises a hollow tube closed at its upper end in any suitable manner, as for instance, by the handle bale At its lower end, the plunger carries a head 52. This-head has an axial opening 53 extending therethrough which may be closed by a ball 54. Above the ball there is an opening 55 in the wall of the plunger into the annular space between the plunger and the barrel. This opening is preferably made by partially severing a portion of the plunger, providing a U- shaped slit and turning the severed portion inwardly to form a tongue 5l. As shown in Fig. 4 this tongue then forms an upward stop for the ball 54. l

The entire Ypump mechanism is preferably constructed in such a manner as to eliminate'as far as possible the necessity of machine tool iinishing of the parts. To this end, the barrel l!) comprises a relatively thin tube being secured to the member 44 at its bottom by external threads and provided with an enlarged portion 6i), at its upper end having internal threads to receive a packing nut 6I. The shoulder 62 formed at the point of enlargement of the barrel provides a seat for a sealing washer 63 of the leather or other y suitable material. This washer is held in place against the shoulder by a thin annular metallic member 64 having a dished surface to coact with a reversely dished surface S5 formed in the packing nut 6| to compress suitable packing material E6 against the plunger Si). struction eliminates machining of the barrel to provide seats for the packing material, thus reducing the manufacturing cost ofthe pump and at the same time permitting the pump to be made of a light weight material. Y

The lower end of the plunger is arranged to eliminate as far as possible machine tool operations on the plunger and to permit the use of a light weight material. As indicated in the drawings, the fitting 52 is secured to the plunger by internal threads lil. Interposed between the end of the plunger and the enlarged head 'li of the fitting is a iiexible pump washer l2. To eliminate machining of the external and end surfaces of theplunger, and at the same time insure proper seatingof the washer l2, a small cylindrical sleeve 'i3 is interposed between the pump washerV 1 2 and the end of the tube. This sleeve is of sui- This form of con-v iicient length to nil the cup shaped portion ci the washer. Thus, it will be seen that the machining operations are limited to the members 44 and 52, the packing gland Gl and the two sleeves 13 and 64, all of which are comparatively small parts, readily produced in automatic screw machines.

Asis usual in this type of pump, the construction shown is double acting and being a displacement pump on the downstroke and a lift pump on the upstroke; that is to say, on the upstroke the ball 54 closes the opening in the plunger, a vacuum is created beneath it, vand the liquid is drawn by suction past the check valve i4 into the barrel. On the downstroke, this liquid is displaced through the opening 53 into the interior of the barrel against the air in the upper portion thereof (which is thereby compressed) and also ows through the opening 55 into the annular space between the plunger and the barrel against the air which is compressed in the upper portion of the barrel. On the succeeding stroke, the liquid in the annular space is lifted by the head of the plunger., Thus on either stroke, liquid passes a continuous stream from the discharge nipple 31 and the discharge hose 4I to the Controlling nozzle.

We claim:

l. ln a stirrup pump, the combination of a pump barrel, a bracket therefor comprising a base and an upright, the upright having a substantially horizontal portion provided with an open ended slot to receive the pump barreLa retaining member permanently attached to the horizontal portion to close said slot and hold the barrel against the base or the slot to prevent movement in a horizontal plane, and means to prevent vertical displacement of the barrel.

2. n a stirrup pump, the combination of a pump barrel, a bracket therefor comprising a base and an upright terminating at its upper end in a horizontal portion, said horizontal portion being provided with an open ended slot to receive the pump barrel, a block secured to said horizontal portion and provided with an oppositely extending open ended slot to receive said barrel, whereby the block and bracket each closes the slot in the other to prevent displacement of the barrel in a horizontal direction, and means to prevent vertical displacement of said barrel.

3. In a stirrup pump, the combination ci a pump barrel, a bracket therefor comprising a base and an upright, the upright being bent over at the top into a substantially horizontal portion, la retaining member permanently attached to the horizontal portion adjacent the end thereof to secure the pump barrel against movement in a horizontal plane, and having a vertical wall por tion provided with an opening therein, and a discharge nipple permanently secured to the barrel passing through the opening to prevent vertical displacement of the barrel.

fi. In a stirrup pump, the combination of a pump barrel, a bracket therefor comprising a base and an upright, the upright being bent over at the top into a substantially horizontal portion, said portion having a slot at its outer end to receive the pump barrel and provide a pair oi outward extending tines to embrace the barrel, an attaching member permanently attached to the horizontal portion of said bracket to close sai-d slot and secure the barrel against movement in a horizontal plane, said member having a vertical portion provided with an opening therein, and means secured to the barrel and adapted to pass outward through the opening in the member to prevent vertical displacement of the barrel.

5. In a stirrup pump, the combination of a pump barrel, a bracket therefor comprising a base and an upright, the upright having a substantially horizontal portion provided with a slotted opening to receive the pump barrel, a block provided with a slotted opening to receive said barrel, whereby said barrel may be gripped between the horizontal portion of the bracket and the block, and a discharge tube projecting horizontally from said barrel and passing through an opening in the block to prevent vertical displacement of the barrel.

6. In a stirrup pump, the combination of a .pump barrel, a bracket therefor comprising a base and an upright in the form of a channel beam, said upright being bent over at the top to form a substantially horizontal extension with its flanges lying in a Vertical plane, an attaching member mounted in the space between the flanges at the end of said extension and provided with a slotted opening to receive the pump barrel, whereby the barrel may be gripped between the member and the horizontal extension of the bracket, said member having an opening in a vertical face thereof and a discharge nipple permanently secured to said barrel and passing through the opening in the member to secure the barrel against vertical movement.

7. In a stirrup pump, the combination of a pump barrel, a bracket therefor comprising a base and an upright, said upright having a horizontal extension, a U-shaped attaching member mounted in said extension, the legs of said member lying in a horizontal plane and each being provided with a slotted opening to receive the barrel whereby the barrel may be gripped between the member and the horizontal extension of the bracket, said U-shaped member having an opening in its vertical face anda discharge nipple secured to said barrel and passing through the opening in the member to secure the barrel against vertical movement.

8. In a stirrup pump, a pump barrel having a discharge nipple extending radially therefrom, a base having an upright provided with intersecting vertical and horizontal openings to receive the pump barrel and discharge nipple respectively, whereby the walls of the vertical opening embrace the pump barrel and prevent horizontal movement of the pump barrel and the walls of the horizontal opening embrace the discharge nipple and thereby prevent vertical movement of the pump barrel.

DANIEL KELLEHER. HERMAN J. TROCHE. 

